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Additions to Philippine Slender Skinks of the Brachymeles bonitae Complex (Reptilia: Squamata: Scincidae) II: a new species from the northern Philippines



We describe a new digitless scincid lizard of the genus Brachymeles from northern Luzon and Camiguin Norte islands in the Philippines. This species belongs to the Brachymeles bonitae Complex, and both molecular and morphological data confirm that this species is distinct from all other congeners. Formerly considered to be a single widespread species, this group of species has been the focus of recent systematic reviews. Here we describe a new species in the B. bonitae Complex, recognized currently to constitute five species. Brachymeles ilocandia sp. nov. is the second digitless and the seventeenth non-pentadactyl species in genus. The description of this species brings the total number of species in the genus to 40, and provides new insight into unique distribution patterns of species of the northern Philippines.



Reptilia, Babuyan Island Group, biodiversity, ecological niche modeling, endemism, faunal region, fossorial, Luzon Island, non-pentadactyl, pentadactyl

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Barve, N., Barve, V., Jiménez-Valverde, A., Lira-Noriega, A., Maher, S.P., Peterson, A.T., Soberón, J. & Villalobos, F. (2011) The crucial role of the accessible area in ecological niche modeling and species distribution modeling. Ecological Modeling, 222, 1810–1819.

Brown, J.L. (2014) SDMtoolbox: a python‐based GIS toolkit for landscape genetic, biogeographic and species distribution model analyses. Methods in Ecology and Evolution, 5, 694–700.

Brown, R.M. & Diesmos, A.C. (2002) Application of lineage-based species concepts to oceanic island frog populations: the effects of differing taxonomic philosophies on the estimation of Philippine biodiversity. Silliman Journal, 42, 133–162.

Brown, R.M. & Diesmos, A.C. (2009) Philippines, Biology. In: Gillespie, R., Clague, D. (Eds.), Encyclopedia of Islands. University of California Press, Berkeley, California, pp. 723–732.

Brown, R.M. & Guttman, S.I. (2002) Phylogenetic systematics of the Rana signata complex of Philippine and Bornean stream frogs: reconsideration of Huxley’s modification of Wallace’s Line at the Oriental–Australian faunal zone interface. Biological Journal of the Linnean Society, 76, 393–461.

Brown, R.M. & Siler, C.D. (2013) Spotted stream frog diversification at the Australasian faunal zone interface, mainland versus island comparisons, and a test of the Philippine dual umbilici hypothesis. Journal of Biogeography, 41, 182–195.

Brown, R.M., Diesmos, A.C. & Alcala, A.C. (2002) The state of Philippine herpetology and the challenges for the next decade. Silliman Journal, 42, 18–87

Brown, R.M., Siler, C.D., Diesmos, A.C. & Alcala, A.C. (2009) The Philippine frogs of the genus Leptobrachium (Anura; Megophryidae): phylogeny-based species delimitation, taxonomic revision, and descriptions of three new species. Herpetological Monograph, 23, 1–44.

Brown, R.M., Siler, C.D., Oliveros, C.H., Esselstyn, J.A., Diesmos, A.C., Hosner, P.A., Linkem, C.W., Barley, A.J., Oaks, J.R., Sanguila, M.B., Welton, L.J., Blackburn, D.S., Moyle, R.G., Peterson, A.T. & Alcala, A.C. (2013) Evolutionary processes of diversification in a model island archipelago. Annual Review of Ecology, Evolution, and Systematics, 44, 411–435.

Brown, W.C. (1956) A revision of the genus Brachymeles (Scincidae), with descriptions of new species and subspecies. Breviora, 54, 1–19.

Brown, W.C. & Alcala, A.C. (1970) The zoogeography of the Philippine Islands, a fringing archipelago. Proceedings of the California Academy of Sciences, 38, 105–130.

Brown, W.C. & Alcala, A.C. (1980) Philippine Lizards of the Family Scincidae. Philippine University Press, Dumaguete City, 264 pp.

Brown, W.C. & Rabor, D.S. (1967) Review of the genus Brachymeles (Scincidae), with descriptions of new species and subspecies. Proceedings of the California Academy of Sciences, 15, 525–548.

Davis D.R., Feller, K.D., Brown, R.F. & Siler, C.S. (2014) Evaluating the diversity of Philippine Slender Skinks of the Brachymeles bonitae Complex (Reptilia: Squamata: Scincidae): redescription of B. tridactylus and descriptions of two new species. Journal of Herpetology, 48, 480–494.

de Queiroz, K. (1998) The general lineage concept of species, species criteria, and the process of speciation: a conceptual unification and terminological recommendations. In: Howard, D.J. & Berlocher, S.H. (Eds.), Endless Forms: Species and Speciation. Oxford University Press, New York, pp. 57–75.

de Queiroz, K. (1999) The general lineage concept of species and the defining properties of the species category. In: Wilson, R.A. (Ed.), Species: New Interdisciplinary Essays. Massachusetts Institute of Technology Press, Cambridge, Massachusetts, pp. 49–89.

Diesmos, A.C., Watters, J.L., Huron, N.A., Davis, D.R., Alcala, A.C., Crombie, R.I., Afuang, L.E., Gee-Das, G., Sison, R.V., Sanguila, M.B., Penrod, M.L., Labonte, M.J., Davey, C.S., Leone, E.A., Diesmos, M.L., Sy, E.Y., Welton, L.J., Brown, R.M. & Siler, C.D. (2015) Amphibians of the Philippines, part I: checklist of the species. Proceedings of the California Academy of Sciences, Fourth Series, 62, 457–539.

Duméril, A.M.C. & Bibron, G. (1839) Erpétologie Général ou, Histoire Naturelle Compléte des Reptiles. Librairie Encylopédique de Roret, Paris, France, pp. 488.

ESRI (2013) ArcGIS Desktop: Release 10.2. Environmental Systems Research Institute, Redlands, CA.

Frost, D.R. & Hillis, D.M. (1990) Species in concept and practice: herpetological applications. Herpetologica, 46, 87–104.

Geheber, A.D., Davis, D.R., Watters, J.W., Penrod, M.L., Feller, K.D., Davey, C.S., Ellsworth, E.D., Flanagan, R.L., Heitz, B.D., Moore, T., Nguyen, M.D.C., Roberts, A., Sutton, J., Sanguila, M.B., Linkem, C.W., Brown, R.M. & Siler, C.D. (2016) Additions to the Philippine slender skinks of the Brachymeles bonitae Complex (Reptilia: Squamata: Scincidae: Brachymeles) I: a new species from Lubang Island. Zootaxa, 4132 (1), 1–14.

Heyer, W.R. (1972) A new limbless skink (Reptilia: Scincidae) from Thailand with comments on the generic status of the limbless skinks of Southeast Asia. Fieldiana: Zoology, 58, 109–129.

Hijmans, R.J. (2012) Cross-validation of species distribution models: removing spatial sorting bias and calibration with a null model. Ecology, 93, 679–688.

Hijmans, R.J., Cameron, S.E., Parra, J.L., Jones, P.G. & Jarvis, A. (2005) Very high resolution interpolated climate surfaces for global land areas. International Journal of Climatology, 25, 1965–1978.

Hikida, T. (1982) A new limbless Brachymeles (Sauria: Scincidae) from Mt. Kinabalu, North Borneo. Copeia, 1982, 840–844.

International Union for Conservation of Natura (IUCN) (2015) IUCN Red List of Threatened Species. Version 2015.4. Available from: (accessed 15 July 2015)

Köhler, G. (2012) Color Catalog for Field Biologists. Herpeton, Offenbach, Germany, 49 pp.

Linkem, C.W., Hesed, K.M., Diesmos, A.C. & Brown, R.M. (2010) Species boundaries and cryptic lineage diversity in a Philippine forest skink complex (Reptilia; Squamata; Scincidae: Lygosominae). Molecular Phylogenetics and Evolution, 56, 572–85.

Linkem, C.W., Diesmos, A.C. & Brown, R.M. (2011) Molecular systematics of the Philippine forest skinks (Reptilia: Scincidae: Sphenomorphus): testing morphological and biogeographic hypotheses of interspecific relationships. Zoological Journal of the Linnaean Society, 163, 1217–1243.

Pearson, R.G., Raxworthy, C., Nakamura, M. & Peterson, A.T. (2007) Predicting species' distributions from small numbers of occurrence records: a test case using cryptic geckos in Madagascar. Journal of Biogeography, 34, 102–117.

Phillips, S.J., Anderson, R.P. & Schapire, R.E. (2006) Maximum entropy modeling of species geographic distributions. Ecological Modelling, 190, 231–259.

Phillips, S.J. & Dudík, M. (2008) Modeling of species distributions with MaxEnt: new extensions and a comprehensive evaluation. Ecography, 31, 161–175.

Sabaj Pérez, M.H. (Ed.) (2014) Standard symbolic codes for institutional resource collections in herpetology and ichthyology: an online reference. Version 5.0. American Society of Ichthyologists and Herpetologists, Washington, D.C. Available from: (accessed 1 June 2015)

Siler, C.D. (2010) Squamata, Scincidae, Brachymeles elerae (Taylor, 1917): Rediscovery in Old Balbalan, Cordillera Mountain Range, Luzon Island, Philippines, and natural history. Check List, 6, 616–618.

Siler, C.D. & Brown, R.M. (2010) Phylogeny-based species delimitation in Philippine slender skinks (Reptilia: Squamata: Scincidae: Brachymeles): taxonomic revision of pentadactyl species groups and description of three new species. Herpetological Monographs, 24, 1–54.

Siler, C.D. & Brown, R.M. (2011) Evidence for repeated acquisition and loss of complex body-form characters in an insular clade of Southeast Asian semi-fossorial skinks. Evolution, 65, 2641–2663.

Siler, C.D., Rico, E.L., Duya, M.R. & Brown, R.M. (2009) A new limb-reduced, loam-swimming skink (Squamata: Scincidae: Brachymeles) from central Luzon Island, Philippines. Herpetologica, 65, 449–459.

Siler, C.D., Diesmos, A.C. & Brown, R.M. (2010a) A new loam-swimming skink, genus Brachymeles (Reptilia: Squamata: Scincidae) from Luzon and Catanduanes Islands, Philippines. Journal of Herpetology, 44, 49–60.

Siler, C.D., Balete, D.S., Diesmos, A.C. & Brown, R.M. (2010b) A new legless loam-swimming lizard (Reptilia: Squamata: Scincidae: genus Brachymeles) from the Bicol Peninsula, Luzon Island, Philippines. Copeia, 2010, 114–122.

Siler, C.D., Oaks, J.R., Esselstyn, J.A., Diesmos, A.C. & Brown, R.M. (2010c) Phylogeny and biogeography of Philippine bent-toed geckos (Gekkonidae: Cyrtodactylus) contradict a prevailing model of Pleistocene diversification. Molecular Phylogenetics and Evolution, 55, 699–710.

Siler, C.D., Diesmos, A.C., Alcala, A.C. & Brown, R.M. (2011a) Phylogeny of Philippine slender skinks (Scincidae: Brachymeles) reveals underestimated species diversity, complex biogeographical relationships, and cryptic patterns of lineage diversification. Molecular Phylogenetics and Evolution, 59, 53–65.

Siler, C.D., Fuiten, A.M., Jones, R.M., Alcala, A.C. & Brown, R.M. (2011b) Phylogeny-based species delimitation in Philippines slender skinks (Reptilia: Squamata: Scincidae) II: taxonomic revision of Brachymeles samarensis and description of five new species. Herpetological Monographs, 25, 76–112.

Siler, C.D., Crombie, R.I., Diesmos, A.C. & Brown, R.M. (2011c) Redescription of two poorly known slender skinks, Brachymeles bicolor and Brachymeles pathfinderi (Reptilia: Squamata: Scincidae), from the Philippines. Journal of Herpetology, 45, 355–369.

Siler, C.D., Jones, R.M., Welton, L.J. & Brown, R.M. (2011d) Redescription of tetradactyl, Philippine slender skinks (genus Brachymeles). Herpetologica, 67, 300–317.

Siler, C.D., Jones, R.M., Diesmos, A.C., Diesmos, M.L. & Brown, R.M. (2012a) Phylogeny-based species delimitation in Philippine slender skinks (Reptilia: Squamata: Scincidae) III: taxonomic revision of the Brachymeles gracilis complex and descriptions of three new species. Herpetological Monographs, 26, 135–172.

Siler, C.D., Oaks, J.R., Welton, L.J., Linkem, C.W., Swab, J.C., Diesmos, A.C. & Brown, R.M. (2012b) Did geckos ride the Palawan raft to the Philippines? Journal of Biogeography, 39, 1217–1234.

Siler, C.D., Oaks, J.R., Cobb, K., Ota, H. & Brown, R.M. (2014) Critically endangered island endemic or peripheral population of a widespread species? Conservation genetics of Kikuchi's gecko and the global challenge of protecting peripheral oceanic island endemic vertebrates. Diversity and Distributions, 20, 756–772.

Simpson, G.G. (1961) Principles of Animal Taxonomy. Columbia University Press, New York, New York, 247 pp.

Taylor, E.H. (1917) Brachymeles, a genus of Philippine lizards. The Philippine Journal of Science, 12, 267–279.

Watters, J.L. & Siler, C.D. (2016) Involving Undergraduates in Research – Herpetology, Spring 2015. Available from: (accessed 3 May 2016).

Welton, L.J., Siler, C.D., Oaks, J.R., Diesmos, A.C. & Brown, R.M. (2013) Multilocus phylogeny and Bayesian estimates of species boundaries reveal hidden evolutionary relationships and cryptic diversity in Southeast Asian monitor lizards. Molecular Ecology, 22, 3495–3510.

Welton, L.J., Wood, P.L. Jr., Oaks, J.R., Siler, C.D. & Brown, R.M. (2014) Fossil-calibrated phylogeny and historical biogeography of Southeast Asian water monitors (Varanus salvator Complex). Molecular Phylogenetics and Evolution, 74, 29–37.

Wiley, E.O. (1978) The evolutionary species concept reconsidered. Systematic Zoology, 21, 17–26.



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